How to invest with confidence and certainty?

How does one know whether an investment in any one stock is sound? I find that stock research tends to lead to just different opinions which leads to confusion whether to invest. Is there any certain way to know with a high level of certainty that a stock investment is safe?

Stock research is about facts, not opinions. Looking at the companies’ finances and what they have been doing recently – in combination with their current price and price history – will tell you whether or not it is a good time to buy.

You should not be reading opinion pieces about how companies are doing for “research” because that isn’t really research. You should form your own opinions based on facts about the company